Slide for extension-tables



(No Model.)

H. J. DURGIN.

SLIDE P011 EXTENSION TABLES.

No. 581,956. Patented May 4, 1897.

fittest" I Inventor:

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HENRY J. DURGIN, OF ROCHESTER, NEW YORK.

SLIDE FOR EXTENSION=TABLES.

SPECIFICATION forming part of Letters Patent No. 581,956, dated May 4,1897. Application filed April 80, 1896. Serial No. 589,730. No model.)

To all whom it may concern.-

Be it known that I, HENRY J. DURGIN, of Rochester, in the county ofMonroe and State of New York, have invented a new and useful Improvementin Slides forEXtension-Tables,which improvement is fully set forth inthe following specification and shown in the accompanying drawings.

My invention relates to slides for GXl6IlSlO1ltables employed for thepurpose of lengthening'or shortening the tables. These slides areusually made of wood in two or more pieces and joined side by side, soas to slide freely upon each other in longitudinal directions.

The object of my invention is to produce a table-slide similar in formto those in common use, but one that may be more cheaply manufacturedand stronger and more durable. This I accomplish by abandoning all shortslide-pieces of either wood or metal in its construction, thus avoidingthe cutting away of the material of the slide in a manner to render itweak, and by providing a continuous and unbroken bearing between theparts in contact to the extent to which they may at any time overlap.

The invention is hereinafter more fully described, and particularlypointed out in the claim.

Referring to the drawings, Figure 1 is an end view of the slide. Fig. 2is a plan of the middle piece, view indicated by arrow 2 in Fig. 1. Fig.3 is an edge view of the middle piece indicated by arrow 3 in Fig. 2.Fig. 4 is a plan view of the middle piece indicated by arrow 4 inFig. 1. Fig. 5 shows the slide as a whole partly drawn out. Fig. 6 is alongitudinal section of the slide taken on the dotted line 6 6 inFig. 1. Fig. 1 is drawn to a scale larger, and Fig. 5 to a scalesmaller, than that of the other figures.

Referring to the drawings, A B O are the three main parts of the slide,they being of the same width and length and preferably made of wood. Themiddle part A is made with a longitudinal groove or channel a in oneside with overhanging lips or gibs Z), the groove being uniform incross-section and extending from end to end of the part. The contiguousoutside part 0 is formed with a T-shaped tongue or male part 0 along oneside thereof, adapted to fit freely in the groove 0 of the part A, asshown. This tongue 0 is a portion of the part 0 itself (and not a separate piece inserted in a channel formed in the 5 5 part C) and extendscontinuously and unbroken from end to end of the part C. From thisdescription of the parts A C it will be understood that the bearingbetween them is at all times continuous as to longitudinal directions tothe extent to which they lap upon each other.

The part B is formed with a groove or channel d, similar to the grooveon in the part A, the latter part having a tongue 6 to fit the groove.This tongue 6 and the groove (Z are uniform in cross-section andcontinuous from end to end of the respective parts, so that the bearingbetween them at any time will be continuous and unbroken to the extentto which they lap upon each other, the same as in the case of the partsA 0, above described. The tongue c is a solid part of the piece A, andnot a separate piece inserted therein. The tongues c and e are provided,respec: tively, with two lips or projections g g and h h,which fitwithin the undercut portidns of the grooves a and cl and prevent theparts from being separated except by endwise m.ove ment. On account ofmaking these several tongues and grooves continuous from end to end ofthe respective parts of the slide long bearing-surfaces between them aresecured, and by forming the male portions or tongues of the parts A O ofthe slide directly upon or from the parts themselves I avoid cuttinginto said parts in a manner to weaken them. This gives greater strengthto those parts and renders them much less liable to split than if theywere cut into to receive separate male 0 pieces or tongues.

The tongue e is provided with a narrow longitudinal groove 1', extendingfrom end to end of the part A. This part is provided with stops at m,extending into the groove to intercept a pin 76, rigid in the part B andoccupying the groove between the stops at m, Fig. 6. On account of thisconstruction of the device the longitudinal movements of the part 13upon the part A are limited by the :00 pin it encountering one or theother of the stops m m, and theparts are prevented from becomingseparated or detached.

The tongue or male piece 0 of the part 0 is similarly formed with agroove 0, extending the full length of the part, the latter beingprovided with stops at 71, extending into said groove. The adjacent partA is provided with a pin Z, reaching into the groove between the stopsit n,which serves to limit the longitudinal motions of the parts A 0upon each other, said parts being prevented from be coming separated.

There maybe two or more parts A B 0 taken to form the slide, but two, amale and a female part, are necessary, the number above two not beingessential to my invention.

WVhat I claim as my invention is A table-slide consisting of a series oflongitudinally-movable strips of the same width, one surface of one ofthe side pieces and of each of the intermediate pieces being providedwith a longitudinally-undercut groove extending continuously andunbrokenfrom one end of the strip to the other, and one surface of theother outside strip and the other side of each of the intermediatestrips being provided with a T-shaped tongue, the central portion ofeach tongue being provided with a narrow continuous and unbroken grooveextending from one end of the strip to the other of two pins secured ata distance from each other in the groove of each tongue, one of whichpins is detachable and one pin permanently secured in the undercutgroove of each strip, the permanent pin being located between the twopins and adapted to engage therewith and limit the movement of thestrips upon each other, substantially as set forth.

In witness whereof I have hereunto set my hand, this 25th day of April,1896, in the presence of two subscribing witnesses.

HENRY J. DURGIN.

Witnesses:

Enos B. Wnrrnonn, M. L. WINs'roN.

